Steam-boiler.



PATENTED JAN. 28, 1908.

W. H- SHAFER. STEAM BOILER.

APPLIOATION FILED JUNE 1.1906.

(Mn ams.

WILLIAM H. SHAFER, OF CINCINNATI, OHIO.-

STE AM-B OILER.

Specification of Letters Patent.

Patented. Jan. 28, 1908.

Application filed June 1 1906. Serial No. 319.712.

T 0 all whom it may concern:

Be it known that I, WILLIAM H. SHAFER, a citizen of the United States,residing at Cincinnati, Ohio, have invented a new and useful Improvementin Steam Boilers, of which the following is a specification.

My invention relates to steam boilers of the water tube class adaptedfor the use of fire engines or other purposes, and the ob jects of myimprovement are to provide a series of independently removable tubesections or groups of straight vertical tubes, each group forming aseparate generating unit; to provide means for independently inspecting,cleaning or replacing the tubes of each group; to secure the manifoldsalternately in different horizontal planes to reduce their chillingeffect and for facilitating the passage of the hot gases between themand among the tubes whereby a more intimate chemical union may beobtained of the products of combustion than is possible within therestricted area allowable for combustion chambers in boilers of thisclass; to provide headers with passages graduated in size to meet thelocation and demands of the connecting tubes; to provide means forindependently inspecting, cleaning or removing the headers; to provide acone shaped annular dome adjacent to the chimney for superheating thesteam; to provide a baffle plate within the dome for deflecting againstits heated wall the entrained Water discharged therein from thegenerating units that it may be converted into steam; to provide meansfor supplying the throttle pipe with dry steam from the top of the dometo prevent the overflow therein of foaming water from the boiler. Theseobjects are attained in the following described manner as illustrated inthe accompanying drawings, in which Figure 1 is a vertical section onthe line aa of Fig. 2 of the portion of a steam boiler embodying myimprovement; Fig. 2, the plan of a couple of tube sections or groups;Fig. 3, the front elevation of a group of tubes or generating unit withparts broken away and showing the alternate manifolds in differenthorizontal planes, and Fig. 4, an inverted view of Fig. 2.

In the drawings, the cylindrical shell encircles the fire boX 1 andconsists of concentric walls 2 and 3 which inclose between them theannular steam chamber 4 and the water leg 5. Said walls are converged atthe top to form a cone shaped annular steam dome 6 in communication withthe steam chamber.

projecting arms 12 is thereby removably supported within the upperportion of the shell on lugs 13 secured therein. A series of preferablyeight radial top headers 14 are each provided with a discharge pipe 15whereby they are removably secured to ring 11 by means of clamp straps16. Said pipes 15 are removably secured in the inside wall of the domeand discharge the steam and entrained water from the headers against thebaflie plate within the dome whereby it is deflected in a downwarddirection toward the steam chamber.

A series. of radial bottom headers 17 register with the respective topheaders 14 and are removably secured to the inner wall 3 and incommunication with the Water leg 5 by means of internal couplings 18which are accessible through plugged openings 19 formed in the outerwall 2 in registration therewith. Said top and bottom headers arerespectively provided with a series of similar manifolds 21 and 22 whichregister with each other and extend laterally therefrom. A series ofmanifolds 23 alternating with the manifolds 21 depend in a commonhorizontal plane from each of the top headers to which they areremovably secured by means of internal couplings 24. Said couplingsregister with and are accessible through the respective plugged openings25 and the openings for the discharge pipes 15 formed in the topheaders. A similar series of manifolds 26 registering with manifolds 23and alternating with manifolds 22 are in like manner removably securedto each of the bottom headers and in a common horizontal plane thereoverby means of internal couplings 27 which register with plugged opening28. A multiplicity of vertical tubes 31 of uniform length are removablythreaded at one end in manifolds 21 and removably swaged at the otherend in manifolds 22 in registration with plugged openings 32 therein. Aseries of shorter vertical tubes 33 of uniform length are in like mannerremovably secured at their opposite ends in corresponding alternatingmanifolds 23 and 26 and in registration with corresponding pluggedopenings 34 formed in manifolds 26. The various plugged openings in theouter shell, headers and manifolds provide independent means of accessfor the inspection, or cleaning of the headers, the manifolds orvertical tubes, and for the removal or replacing of either of the bottomheaders, alternating top or bottom manifolds or vertical tubes. Thecirculating channels 35 within the respective headers are graduated in'size proportionate with the demand and location of the vertical tubesvcommunicating therewith.

In operation, corresponding top and bottom headers together with themanifolds and tubes communicating therewith form separate and distinctremovable units of circulation and generation between the water leg andthe steam dome. Said dome intercepts and utilizes the heat in itspassage from the top headers to the chimney opening to evaporate theentrained Water from the headers and to superheat the steam thereinabove the baffle plate before it enters the steam pipe 8.

.The units of 'circulationeach consisting of corresponding top andbottom headers with their connecting tubes or either of the tubes may beremoved or replaced through the furnace by the removal of the grates.

Having fully described my improvement what I claim as my invention anddesire to secure by Letters Patent of the United States 1s:

1. In combination, a radial header provided with transverse manifoldswhich are positioned alternately in different horizontal planes, aheader registering therewith and provided with similar manifolds, andtubes communicating with the headers through corres onding manifolds.

2. n combination, a radial top header provided with transverse manifoldsand with a discharge pipe, a radial bottom header provided withmanifolds positioned alternately in different horizontal planes andcommunicating directly with the water leg of a steam boiler, and tubesconnecting corresponding manifolds of the respective headers together.

3. In combination, top and bottom radial headers each provided withmanifolds alternately positioned in different horizontal planes, andtubes connecting corresponding manifolds of the respective headerstogether.

4. In combination, top and bottom headers each provided with transversemanifolds positioned in different horizontal planes, and vertical tubesconnecting corresponding manifolds of respective headers together.

5. In a steam boiler, a separate and distinct unit of generation,consisting of top and bottom radial headers each provided withtransverse manifolds alternating in different horizontal planes, andstraight tubes connecting corresponding manifolds of the respectiveheaders together.

6. In a steam boiler, an independently removable unit of generationconsisting of.

radial top and bottom headers, each being provided with transversemanifolds positioned alternately in different planes, and tubesconnecting corresponding manifolds of the respective headers together. I

7: In combination, top and bottom headers each provided with transversemanifolds in different horizontal planes, vertical tubes connecting theheaders together, and other vertical tubes connecting correspondingmanifolds of the respective headers together.

8. In combination, top and bottom headers each provided with transversemanifolds in different horizontal planes, tubes connecting correspondingmanifolds of the respective headers together, the manifolds of oneheader being provided with plugged openings in registration with therespective tubes.

9. In combination, a radial'header provided with transverse manifolds indifferent horizontal planes, said manifolds being pro vided on one sidewith openings for the engagement of tubes therewith and on the otherside with plugged openings in registration with the respective saidformer openings.

10. In combination, an annular dome in form the frustum of a cone, and abaffle plate secured therein and parallel with its sides.

WILLIAM H. SHAFER.

Witnesses:

HARRY HEss, R. S. CARR.

